This week, two teams of scientists released reports detailing the origins of Native American peoples. Both groups looked at ancient and modern DNA to attempt to learn more about the movements of populations from Asia into the New World, and about how groups mixed once they got here. Both discovered …

Archaeologists unearthed a stone tool at an ancient rock shelter in Oregon that could be older than any known site of human occupation in western North America.<p>The hand-held scraper was chipped from a piece of orange agate that is not normally found in eastern Oregon. The tool was found about eight …